Apparatus for the manufacture of handle attachments for paper bags



June 30, 1959 J. BAGNALL APPARATUS FOR THE MANUFACTURE OF HANDLE Fil ed rm. 1, 1957 ATTACHMENTS FOR PAPER BAGS 2 Sheets-Sheet 1 /NVENTOR J'onu Bacnnu.

June- 30, 1959 J. BAGNALL APPARATUS FOR THE MANUFACTURE OF HANDLE ATTACHMENTS FOR PAPER BAGS Filed Nov; 1, 1957 2 Sheets-Sheet. 2

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APPARATUS FOR THE MANUFACTURE OF HANDLE BAGS John Bagnall, Windsor Mills, Quebec, Canada, assignor to Canada Paper Company, Montreal, Quebec, Canada Application November 1, 1957, Serial No. 694,049

2 Claims. (Cl; 29-126) 7 This invention relates to improvements in apparatus for the manufacture of handle attachments for paper bags and more particularly to an improved method of applying glue to the reinforcing strip of cardboard to which the string handle is attached by means of staples.

The invention consists essentially in the use of a modified form of top roll of a pair of gluing rolls, the top roll having a pair of spaced apart depressible portions on its peripheral surface, depressible against spring pressure to accommodate the ends of the string handle and the staples securing the string handle to the reinforcing cardboard strip as the handle assembly is fed through the gluing rolls. The peripheral spacing of the depressible portions of the top gluing roll is equal to the distance between the two ends of the string handle. The top gluing roll is also provided with a transverse slot on its peripheral surface, this transverse slot being spaced at a distance ahead of the leading depressible surface portion equal to the distance between the leading end of the string handle and the leading end of the cardboardstrip as it passes through the gluing rolls and acts as a gauge ensuring that the ends of the string handles and the depressible portions of the top gluing roll will align witheach other.

The present invention 'is an improvement'over the gluing roll assembly shown and described in US. Patent No. 2,332,530 (Canadian Patent No. 420,488) in which the top gluing roll had to ride up and over the staples securing the ends of the string handle, leaving a pair of relatively long gaps in which little or no glue was deposited on the handle assembly. In the present invention the top gluing r011 has very little if any upward movement when the ends of the string handle are passing between the rolls resulting in the solid peripheral surface of the roll depositing glue evenly at either ends of the staples with the depressible portions of the top roll depositing glue on all surfaces of staples and ends of the string handles.

The object of the invention is to provide a more uniform and continuous layer of glue over the entire length of a reinforcing strip of cardboard to which a string handle is attached.

A further object of the invention is to provide a top gluing roll having depressible portions on its periphery, taking the shock on passing over the ends of a string handle.

A further object of the invention is to provide a top gluing roll which will act as a gauge to ensure the alignment of the ends of the string handle with spring mounted depressible portions of the top gluing roll.

A further object of the invention is to provide a top gluing roll which will have a greatly increased operating life due to eliminating of riding of the roll up and over the ends of the string handle.

These and other objects of the invention will be apparent from the following specification and the drawings forming a part thereof, in which:

Figure 1 is a partial plan view showing the gluing section of the machine for manufacturing handle attachments for paper bags.

ATTACHMENTS FOR PAPER i:

Figure 2 is aside elevation of the portion of the machine shown in Figure 1.

Figure 3 is a plan view of a formed handle attachment formed by the machine.

Figure 4 is a side elevation of the top gluing roll, partly in section to show one of the spring mounted depressible portions.

Figure 5 is a plan view of the top gluing roll shown in Figure 4. v

Figure 6 is a partial section of the top gluing roll taken A on the line 6-6 of Figure 4.

Figure 7 is apartial vertical section through the side 7 wall of the machine showing the spring mounting of the axle of the 'top gluing roll.

Figure 8 is a vertical transverse section of the side wall of the machine showing the mounting of the pair of gluing rolls. 7

Figure 9 is a diagram showing the engagement of the cardboard strip with the transverse gauge slot in the top gluing roll.

Figure 10 is a diagram similar to Figure 9 but showing the cardboard strip partly through the nip of the gluing rolls and the leading end of the string handle ef fectingdepression of the surface of the top roll.

Referring to the drawings, the paper bag handle forming machine more fully described in United States Patent No. 2,332,530 (Canadian Patent No. 420,488) is hcie shown in part only, disclosing that portion of the machine in which glue is deposited on the reinforcing strip of cardboard to which the string handle is attached.

ing mechanism comprising the shaft 7 on which are mounted the gears 8 and 9 and which also carries the passing-on roller 10. The shaft 7 is suitably driven by gearing not shown. The shaft 11 carrying the top gluing roll 12 is driven by the gear 8 through the gears 13 and 14. Thefshaft 11 also carries the gear 15 which in turn drives the train of gears 16, 17 and 18, the latter gear beingmounted on the sha'ft 19 carrying the sprocket wheel 20. The sprocket wheel 20 is in engagement with and drives the conveyor chain 21. The conveyor chain is provided with a series of carrying hooks 22 and is trained around the sprocket 23 and other sprockets, not shown.

The table 24 mounted on the outside of the frame side members 6 supports the cardboard strips 25 and the formed string handles 26 as they are passed along the machine and beyond the passing-on roll 10 towards the nip of the upper gluing roll 12 and the lower gluing roll 27 which operates in a glue containing tank 28.

The lower gluing roll 27 has its peripheral surface 29 knurled to pick up and hold a continuous film of glue from the tank 28. This film of glue is transferred to the peripheral surface of the top gluing roll 12, the peripheral surface of which is provided with a series of glue holding recesses 30.

A pair of transverse slots 31 are cut in the peripheral surface of the top gluing roll 12 to receive the blocks 32 whose outward facing surface 33 is curved to conform with the diameter of the roll. A pair of side plates 34 are anchored to the sides of the gluing roll 12 by the screws 35. These side plates 34 hold the blocks 32 in place within the slots 31. The outer peripheral edges of the side plates are undercut at 36 to provide clearance for the ends of the string handles and the staples 37 anchoring the handles to the cardboard strip 25 as they pass through the nip of the rolls 12 and 27. The side plates 34 are recessed at 38 to provide stops against which the side projections 39 of the blocks 32 come to rest under the action of the springs 40 which are seated in the recesses 41 of the roll 12.

In Figure 4 of the drawings the peripheral spacing Patented June 30, 1959,

of -the centres of the blocks 32 represented by the arc X is equal to the spacing -X' of the'ends of the string handle 26 shown in Figure 3.

In order that the cardboard strip 25 and its attached handle 26 will be fed-into the nip of'the-rolls-12 and 27 so that the ends of the handle will coincide'with the depressible blocks 32, the top roll l2 is providedwith a transverse slot 42. The leading edge 43 "of the card-- board strip 25 will tend to ride against the surface-of the rotating roll 12 until the slot42' comes down-to the level of the cardboard strip whose leading edge 43' 'will th'en enter the slot and be nipped by the-tworolls. '12

and 27 and carried forward by them. The distance rep-' member 6. The shaft'll is provided with a bearing block 45 sealed in the slot 46 in the side frame 6 and rides on the 'end'of the coil spring 47. A keeper plate 48 is springheld against the top surface of the side frame member 6 by the springs 49 on the studbolts 501 A stop screw 51 is threaded through-the 'keeper'"plate 48 and bears against the bearing block 45 to holdthe'periphery ofthe roll 12 against the periphery of the roll'27." Thepressure of the springs 49 is such that the keeper plate 48 will be held against the top of the side frame member 6 inopposition to the spring 47.

In the operation of this invention,-the cardboard strip 25 with its attached string handle 26 secured'by the staples 37 is fed through the nip'of the gluing rolls 12 and 27 and its position in relation to the depressible blocks 32 is gauged by the slot 42 as shown in Figure 9 of the drawings. As the cardboard strip 25 enters the nip of the rolls 12 and 27, the top roll 12 will rise against the pressure of the springs 49. However, the rise of the roll 12 is limited to the thickness of the cardboard strip 25 as, when the ends of the string handle and their securing staples approach the nip of the rolls 12 and 27 they come into contact with the depressible blocks 32 and are bridged by the undercut 36 of the side plates 34 as shown in Figure 10. By this means a more concentrated transfer of the glue from the roll 12 around the area of the ends of the string handle 26 is accomplishedso that, instead'of spots bare of glue on either side of'the handle ends, as'was the case when 'theroll 12 had to ride up the full height of string and staples, the glue within the pocket formed by the depressed block 32 will be forced to flow around the string continuous with the glueon the cardboard strip.

What I claim is:

l. A gluing roll for applying glue to uneven surfaces, the said roll having one or more transverse slots in its peripheral surface, a block in each of said slots, the said blocks having their outer surfaces conforming with the peripheral"=surfaceofthe roll, a spring backing each of'said blocks, a pair 'of 'side platessecured'to'thesides of-said roll adjacent each of said blocks,'the outer edge of 'said plates being flush with-the periphery of'the roll and being undercut adjzicentsaidblocks, th'e'said side plates limiting the radial outward movement and transverse movement of said blocks, and a transverse gauge slot on the peripheral surface of theroll located at a predetermined peripheral distance from at least one of said blocks. 2. A gluing rollas set forth in=claim 1,' in which the" depth 'of the undercut' of the side' plates is at least equal to the amount of depression -of' the blocks imparted by the uneven'surfa'ceover which the'roll 'is' applied.

ReferencesCited in the file of this patent UNITED .STATES .PATENTS 2,263,893 Schulman Nov. 25, 1941 2,332,530 Robinson et'al'. Oct; 26, 1943 2,490,902 Goodwin Dec. 13, 1949 FOREIGN PATENTS 4,736 Great Britain Feb.'2I 1907 of :1906 

